Senior Software Engineer

Description You must be authorized to work in the United States without employer sponsorship now or in the future. We will not sponsor employment visas. Candidates who will require future sponsorship, including candidates on CPT/OPT/STEMOPT who will require future sponsorship, are not eligible to apply.At Liberty, you'll thrive in a hybrid setting that fosters in-person collaboration, innovation and growth. This approach optimizes both remote and in-person interactions, enabling you to connect and ideate with your team and deepen valuable relationships across the company, while still enjoying the flexibility of remote work for focused tasks and projects. This position follows a hybrid work model (2 days onsite) and is open to candidates located in Portsmouth, NH; Boston, MA; Plano, TX; Indianapolis, IN; and Columbus, OH. Want to work at the leading edge of emerging technology and rapidly expand your engineering skill set? Join Best Coding Squad (BCS), where we develop full-stack solutions with a strong focus on data and insights. Our applications feature cutting-edge GenAI capabilities, agentic workflows, and embedded predictive models (pricing, risk selection, desirability, and more) that streamline manual processes and improve decision-making for our users.As part of BCS, you'll join a cross-functional team of Data Scientists, Data Engineers, and Software Engineers, working together to design data-centric solutions for our business stakeholders. Together, we build, test, and maintain the technical architecture behind our applications, data pipelines, databases, APIs, and predictive model workflows.The ideal candidate is a strong communicator with excellent self-motivation and a proactive approach to learning. A growth mindset is essential as we're constantly exploring new and emerging technologies at the frontier of AI.ResponsibilitiesDesign and develop technical solutions as part of an agile teamWork in a dynamic and exciting agile environment with Scrum Masters, Product Managers, and team members to develop creative data-driven solutions that meet business and technical initiativesWork directly with data scientists to provision data for model development and AI workflowsInteract with internal stakeholders and the core development team to refine the product backlogAutomate and execute all levels of testing (unit, integration, and regression)Design and develop solutions to support ingestion, curation, and provisioning of complex enterprise data to achieve analytics, reporting, and data scienceSupport custom applications through their entire lifecycleProactively avoid and eliminate technical debtChampion engineering excellenceFoster a learning/growth mindset and model it for othersSkills / TechnologiesProgramming Languages: Python, TypeScript/Node.jsFrontend: ReactData: SQL and relational database concepts, Postgres / pgvectorService Architecture: Microservices, REST APIs, JSON, PostmanCI/CD: GitHub Actions (preferable) or equivalent experience such as Bamboo, Jenkins, or Azure DevOpsAWS: CDK, Glue, Lambdas, S3, Step Functions, DynamoDB, ECS, Fargate, SQS, API Gateway, AgentCoreObservability: DataDog, MLflow 3GenAI: Experience with LLM orchestration, search systems, and context engineeringHighly Competitive CandidatesHighly competitive candidates will have more than two of the following:API development: Experience building and scaling APIs for both high-throughput and low-latency applications. Should be able to communicate architectural trade-offs when designing complex API systems.LLM expertise: Hands-on experience invoking LLMs and running prompt experiments, plus the ability to articulate how LLM invocation patterns are treated in API designAgent workflows: Experience building agents with established frameworks such as LangChain, LangGraph, or CrewAISearch systems and context engineering: Experience with RAG, semantic search, vector stores, and knowledge graphsExperience with workflow observability, including prompt and model tracking tools (MLflow, LangSmith, or equivalent) Qualifications A minimum of five years of software engineering experienceA Bachelor’s or Master’s degree in a technical or business discipline, or equivalent experienceGenerally 4-6+ years of professional experienceStrong oral and written communication skills; presentation skillsProficient in consensus building and facilitationAbility to learn and adopt new technologiesUnderstanding of AWS architectures and technical standardsProficiency in multiple programming languages and toolsUnderstanding of agile data engineering concepts and processesConsultative skills, including the ability to understand and apply customer requirements, drawing out unforeseen implications and making recommendations for design, the ability to define design reasoning, and understanding potential impacts of design requirementsCollaboration, prioritization, and adaptability skills requiredAI Fluency: Actively uses AI tools to improve the speed, quality, and scale of work; can point to concrete workflows where AI adds value; critically evaluates and validates AI-generated output; and applies AI responsibly, protecting confidential and customer data. About Us Pay Philosophy: The typical starting salary range for this role is determined by a number of factors including skills, experience, education, certifications and location. The full salary range for this role reflects the competitive labor market value for all employees in these positions across the national market and provides an opportunity to progress as employees grow and develop within the role. Some roles at Liberty Mutual have a corresponding compensation plan which may include commission and/or bonus earnings at rates that vary based on multiple factors set forth in the compensation plan for the role.At Liberty Mutual, our goal is to create a workplace where everyone feels valued, supported, and can thrive. We build an environment that welcomes a wide range of perspectives and experiences, with inclusion embedded in every aspect of our culture and reflected in everyday interactions. This comes to life through comprehensive benefits, workplace flexibility, professional development opportunities, and a host of opportunities provided through our Employee Resource Groups. Each employee plays a role in creating our inclusive culture, which supports every individual to do their best work. Together, we cultivate a community where everyone can make a meaningful impact for our business, our customers, and the communities we serve. We value your hard work, integrity and commitment to make things better, and we put people first by offering you benefits that support your life and well-being. To learn more about our benefit offerings please visit: Liberty Mutual is an equal opportunity employer. We will not tolerate discrimination on the basis of race, color, national origin, sex, sexual orientation, gender identity, religion, age, disability, veteran's status, pregnancy, genetic information or on any basis prohibited by federal, state or local law.Fair Chance NoticesCaliforniaLos Angeles IncorporatedLos Angeles UnincorporatedPhiladelphiaSan FranciscoJob SummaryID: 2026-183526Position Type: Full-TimeMinimum Salary: USD $106,000.00/Yr.Maximum Salary: USD $197,000.00/Yr.Typical Starting Salary: $145KFlexible Time Off Annual Accrual - days: 20Application Deadline: 10/08/2026